Goldmoney offers a gold debit card: https://support.goldmoney.com/hc/en-us/articles/360000526347-What-is-a-Goldmoney-Prepaid-card- https://support.goldmoney.com

Goldmoney offers a gold debit card: https://support.goldmoney.com/hc/en-us/articles/360000526347-What-is-a-Goldmoney-Prepaid-card- https://support.goldmoney.com/hc/en-us/articles/360000526347... Of course when both parties are clients of Coinbase or Goldmoney respectively then the ownership of the bitcoins/gold can be directly transferred.